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Effectus [21]
1 year ago
11

What is the surface area of the cylinder with height 8 and radius 2? Round your answer to the nearest thousandth.​

Mathematics
2 answers:
Gre4nikov [31]1 year ago
6 0

Answer:

surface area of cylinder is 126cm²

Step-by-step explanation:

Height of a cylinder is 8cm

Radius of a cylinder is 2cm

surface area = ?

surface area of cylinder= 2πr(r + h)

=2×22/7×2(2+8)

=44/7×2(10)

=44/7×20

=880/7

=125.71

NikAS [45]1 year ago
4 0

A = 2πrh + 2πr² π=3.14

  • (2 x 3.14 x 2 x 8) + (2 x 3.14 x 2x2)
  • 100.48 + 25.12
  • A =125.6
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A sample of 65 observations is selected from one population with a population standard deviation of 0.75. The sample mean is 2.6
Angelina_Jolie [31]

Answer:

Step-by-step explanation:

The null hypothesis is

H0 : μ1 ≤ μ2

The alternative hypothesis is

H1 : μ1 > μ2

a) it is a one-tailed and also a right tailed test

b) The decision rule is the basis on which the null hypothesis is rejected or not. If 0.08 > p value, reject H0. If 0.08 < p value, do not reject H0.

c) Since the population standard deviations are known, we would use the formula to determine the test statistic(z score)

z = (x1 - x2)/√σ1²/n1 + σ2²/n2

Where

x1 and x2 represents sample means

σ1 and σ2 represents population standard deviations

n1 and n2 represents number of samples

From the information given,

x1 = 2.67

x2 = 2.59

σ1 = 0.75

σ2 = 0.66

n1 = 65

n2 = 50

z = (2.67 - 2.59)/√0.75²/65 + 0.66²/50

= 0.08/√0.00865 + 0.008712

z = 0.61

From the normal distribution table, the probability value corresponding to the z score is 0.73

d) If 0.08 > 0.73, we would reject H0

e) the p-value is 0.73

3 0
3 years ago
HELP
aleksklad [387]

<em>f</em> is a function defined by

{(-3, 1), (-2, 2), (-1, -3), (0, -1), <u>(1, 3)</u>, (2, -2), (3, 0)}

so <em>f</em> (1) = 3. Then

<em>h</em> (<em>g</em> (<em>i</em> (<em>j</em> (<em>f</em> (1))))) = <em>h</em> (<em>g</em> (<em>i</em> (<em>j</em> (3))))

<em>j</em> is defined by

{(-3, 0), (-2, 1), (-1, 2), (0, -1), (1, -2), (2, 3), <u>(3, -3)</u>}

so <em>j</em> (3) = -3, and

<em>h</em> (<em>g</em> (<em>i</em> (<em>j</em> (<em>f</em> (1))))) = <em>h</em> (<em>g</em> (<em>i</em> (-3)))

And so on. Next you have <em>i</em> (-3) = 2, then <em>g</em> (2) = 0, and finally, <em>h</em> (0) = 0, so your answer is correct.

4 0
2 years ago
Which of the statements about the y-axis are true? I.The y-axis is a vertical number line that passes through the origin.II.The 
-BARSIC- [3]

Answer:

No i does not well it will be 0,5 or any other number but the x wont change

Step-by-step explanation:

5 0
2 years ago
A book contains an average of 300 words per page. If you read one page in 68 seconds, what is your reading rate in words per min
Damm [24]
Try this:

1 page     300 words
---------- * --------------- = 4.41 words per sec, or 
68 sec          1 page

4.41 words       60 sec
---------------- * ----------- = 265 words per minute, or
   1 sec             1 min

265 wpm * 60 min
                  --------- = 15882 wpm
                    1 hr
4 0
2 years ago
Find the value of v and w to the nearest tenth.​
Anton [14]

Answer:

Trigonometry Ratio:

Sin65°=v/15

v=15 sin65°

v=13.6°

Sinw°=v/21

= 13.6/21

w=sin^{-1}(13.6/21)

w=40.3°

Hope it helps! :)

6 0
1 year ago
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